# Phase Gaps: Backend-Client Synchronization Issues

This directory contains sprint specifications for addressing gaps, race conditions, and synchronization issues identified between the NoteFlow backend and Tauri/React client.

## Summary of Findings

Analysis of the gRPC API contracts, state management, and streaming operations revealed several categories of issues requiring remediation.

| Sprint | Category | Severity | Effort |
|--------|----------|----------|--------|
| [SPRINT-GAP-001](./sprint-gap-001-streaming-race-conditions.md) | Streaming Race Conditions | High | L |
| [SPRINT-GAP-002](./sprint-gap-002-state-sync-gaps.md) | State Synchronization | Medium | M |
| [SPRINT-GAP-003](./sprint-gap-003-error-handling.md) | Error Handling Mismatches | Medium | M |
| [SPRINT-GAP-004](./sprint-gap-004-diarization-lifecycle.md) | Diarization Job Lifecycle | Medium | S |
| [SPRINT-GAP-005](./sprint-gap-005-entity-resource-leak.md) | Entity Mixin Resource Leak | High | S |

## Priority Matrix

### Critical (Address Immediately)
- **SPRINT-GAP-001**: Audio streaming fire-and-forget can cause data loss
- **SPRINT-GAP-005**: Entity mixin context manager misuse causes resource leaks

### High Priority
- **SPRINT-GAP-002**: Meeting cache invalidation prevents stale data
- **SPRINT-GAP-003**: Silenced errors hide critical failures

### Medium Priority
- **SPRINT-GAP-004**: Diarization polling resilience improvements

## Cross-Cutting Concerns

1. **Observability**: All fixes should emit appropriate log events and metrics
2. **Testing**: Each sprint must include integration tests for the identified scenarios
3. **Backwards Compatibility**: Client-side changes must gracefully handle older server versions

## Analysis Methodology

Issues were identified through:
1. Code review of gRPC mixins (`src/noteflow/grpc/_mixins/`)
2. Tauri command handlers (`client/src-tauri/src/commands/`)
3. TypeScript API adapters (`client/src/api/`)
4. Pattern matching for anti-patterns (`.catch(() => {})`, missing awaits)
5. State machine analysis for race conditions
